Post (Power On Self Test) Error Messages - Compaq Presario 5600 Series Maintenance & Service Manual

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POST (Power On Self Test) Error Messages

An error message displays if the POST encounters a problem. This self-test will run automatically each time the
system is powered on. The self-test will check all assemblies within the computer and report any errors found.
Click on the desired error code for the probable cause of the error and a recommended course of action.
Diskette Drive A or B Error
Extended RAM failed at offset nnn
Invalid NVRAM Media Type
Operating System Not Found
Real Time Clock Error
System Cache Error
System Timer Error
Probable Cause
Drive A: is present, but fails the BIOS POST diskette tests
Probable Cause
Extended memory not working or not configured properly
Probable Cause
nnn is a map of the bits at the RAM address which failed the
memory test
Probable Cause
Hard drive is not working or configured properly
Probable Cause
Hard drive is not working or configured properly
Probable Cause
Type of diskette drive A: not correctly identified
Probable Cause
Problem with NVRAM (CMOS) access
Probable Cause
Keyboard, I/O keyboard controller
(on system board) or mouse error
Probable Cause
Keyboard, I/O keyboard controller
(on system board) or mouse error
Probable Cause
Operating system cannot be located on
either drive A: or C:
Probable Cause
Parity error found in the system bus
Probable Cause
Parity error found in the I/O bus
Probable Cause
Real-time clock fails BIOS test
Probable Cause
RTC battery is dead
Probable Cause
System BIOS copied to Shadow RAM
Probable Cause
RAM cache failed the BIOS test
Probable Cause
CMOS is corrupted or modified incorrectly
Probable Cause
System RAM failed
Probable Cause
DMA, timers, etc.
UMB Upper Limit Segment Address nnn
Probable Cause
Displays the address nnn of the upper limit
of Upper Memory Blocks, indicating released segments of the
BIOS
Probable Cause
Video BIOS successfully copied to shadow RAM
Maintenance & Service Guide
Presario 5600 Series Personal Computers
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Preface Product Description
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Specifications
Failing Bits nnn
Fixed Disk 0 or 1 Failure
Keyboard Controller Error
Parity Check 1
System Battery is Dead
System CMOS Checksum Bad
UMB Upper Limit Segment Address
nnn
Diskette Drive A or B Error
Extended RAM failed at offset nnn
Failing Bits nnn
Fixed Disk 0 or 1 Failure
Fixed Disk Controller Failure
Incorrect Drive A Type
Invalid NVRAM Media Type
Keyboard Controller Error
Keyboard Error
Operating System Not Found
Parity Check 1
Parity Check 2
Real Time Clock Error
System Battery is Dead
System BIOS Shadowed
System Cache Error
System CMOS Checksum Bad
System RAM Failed at Offset, nnn
System Timer Error
Video BIOS Shadowed
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Troubleshooting Illustrated Parts
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Connector Pins Power Cord Requirements
Fixed Disk Controller Failure
Incorrect Drive A Type
Keyboard Error
Parity Check 2
System BIOS Shadowed
System RAM Failed at Offset, nnn
Video BIOS Shadowed
Recommended Action
1. Run Setup.
2. Replace the signal
cables.
3. Replace the drive.
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Recommended Action
1. Replace the memory
modules.
2. Replace the system
board.
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Recommended Action
1. Run Setup.
2. Replace the system
board.
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Recommended Action
1. Run Setup.
2. Replace the signal cable.
3. Replace the hard drive.
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Recommended Action
1. Run Setup.
2. Replace the system
board.
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Recommended Action
1. Run Setup.
2. Replace the diskette
drive.
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Recommended Action
Replace the system board.
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Recommended Action
1. Replace the keyboard.
2. Replace the mouse.
3. Replace the system
board.
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Recommended Action
1. Replace the keyboard.
2. Replace the mouse.
3. Replace the system
board.
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Recommended Action
Run Setup.
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Recommended Action
1. Run Setup.
2. Replace the memory
modules.
3. Replace the system
board.
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Recommended Action
1. Run Setup.
2. Replace the ISA board
(modem).
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Recommended Action
Replace the system board.
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Recommended Action
1. Replace the RTC battery.
2. Run Setup.
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Recommended Action
Replace the system board.
Status message only; no
action required.
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Recommended Action
Run Setup.
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Recommended Action
Run Setup.
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Recommended Action
Replace memory modules.
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Recommended Action
Replace the system board.
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Recommended Action
Run Setup.
Status message only; no
action required.
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Recommended Action
Run Setup.
Status message only; no
action required.
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Removal & Replacement